
OPERATING MANUAL_______________________________________________________________
34 _____________________________________________________________________ U263EN-1.4
• serial commands:
CRH, CT, FCRH, ACAL; AMODE, ASEL, ASCL
In the following, the description of these functions is preceded with a
reminder of the security lock jumper:
Disconnect the security lock jumper!
LED commands
NOTE
If the transmitter has a display/keypad cover, the LED commands
cannot be used.
OPENED COVER OF THE DMP248
press switches
LEDs
UP
DOWN
ENT
FIGURE 5-1 Location of press switches and LEDs
Use the up and down switches (marked with arrows on the printed
board) to find the desired command code and acknowledge it with the
ENT switch. The command codes are (l = lit, = dark):
(0) return to normal state
l (1) relative humidity calibration
l (2) temperature calibration
ll (3) calibration of analogue outputs
ll (9) forced auto-calibration (one auto-calibration; the
security lock jumper must be connected)
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